Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, ...

Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical role in helping control fat levels, cholesterol, and glucose levels. Testosterone ...

For those who need it—men who have low levels of testosterone with symptoms such as low energy, a low libido, and depression, ...

Genetics play a role in low testosterone for some men, but underlying causes vary widely. Many genes influence testosterone ...

Certain health conditions can make it difficult for some men to have normal levels of testosterone. Low testosterone levels, also known as hypogonadism, can affect a person’s life, can cause different ...

NEW YORK (Reuters Health) - A new oral testosterone undecanoate formulation can restore testosterone concentrations to normal in hypogonadal men, researchers report. "Effective as other testosterone ...

Understanding Testosterone Replacement Therapy and Its Alternatives Clearwater, United States - January 5, 2026 / The ...

For more than 80 years, men have been told that testosterone helps prostate cancer grow. But a very different picture has emerged over the past two decades.

What are normal testosterone levels by age? An older photographer mentors a younger one. Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical ...